-- Load the required components
local monitor = peripheral.find("monitor", function(name) return name == "monitor_3" end) -- Monitor peripheral named monitor_3
local modem = peripheral.wrap("back") -- Wrap the modem peripheral (assuming it's on the back of the computer)

-- Function to display the texts on the monitor
local function displayTexts()
    monitor.clear()
    monitor.setCursorPos(1, 1)
    monitor.setTextColor(colors.green)
    monitor.write("ON")
    monitor.setCursorPos(10, 1)
    monitor.setTextColor(colors.red)
    monitor.write("OFF")
end

-- Function to handle monitor touch events
local function handleTouch(x, y)
    if y == 1 then
        if x >= 1 and x <= 2 then
            -- Send ON message to computer_4
            modem.transmit(4, 1, "ON")
            print("Signal sent: ON")
        elseif x >= 10 and x <= 12 then
            -- Send OFF message to computer_4
            modem.transmit(4, 1, "OFF")
            print("Signal sent: OFF")
        end
    end
end

-- Main function
local function main()
    -- Display the texts
    displayTexts()

    while true do
        -- Wait for touch event
        local event, side, x, y = os.pullEvent("monitor_touch")
        handleTouch(x, y)
    end
end

-- Run the main function
main()